Yes, it is possible to apply for a green card while on a TN visa, but it must be done carefully because the TN visa does not permit dual intent meaning you must intend to return to your home country.

TN visa holders can pursue a green card if they qualify under family-based or employment-based categories, but since TN status is temporary, openly applying for permanent residency could jeopardize your TN status. Many professionals first transition to a visa category that allows dual intent, such as the H-1B or L-1, before filing for a green card, to avoid complications during travel or visa renewals.

While on a TN visa, you may apply for a green card through an employer, spouse, or other qualifying relative. However, because the TN visa is for non-immigrant purposes, starting a green card process may create immigration risks, especially during border inspections or visa renewals.